Michael Phelps' GF

Private Jet-Setting

Vegas-Hopping Hobnobber

8/7/2012 12:30 PM PDT BY TMZ STAFF

EXCLUSIVE

Michael Phelps' hot cocktail waitress GF has been around the block -- in fact, she's been around the WORLD ... on private jets ... long before she ever met Phelps ... all because of her pretty face ... and TMZ has the pics to prove it.

Sources tell TMZ, 25-year-old Megan Rossee ingratiated herself with the rich and famous through her job as a model at VIP events around the country -- and thanks to her gig, she and her hot friends have been showered with lavish gifts by their elite admirers ... including expensive trips to Vegas AND flights on private jets.

We're told all the photos were taken within the last year -- in the months before Megan and Phelps eventually came into contact.

HERE'S THE RUNDOWN David Beckham Loses Control Of His Motorcycle In Hollywood Tom Hanks Blasts FIFA Over Women's World Cup Usain Bolt Uses Chris Brown & Drake To Impress Rihanna Country Legend Rips The NFL Over Half Time Show